On Sun, 25 Nov 2001, Martijn van Oosterhout wrote:
> On Sat, Nov 24, 2001 at 11:47:01PM -0500, Robert Hardy wrote:
> > Here is a hand transcribed kernel oops with max ORINOCO_DEBUG:
> > Code: 8b 43 08 8b 80 90 00 00 00 85 c0 74 11 8b 40 34 85 c0 74 0a
> > <1>Unable to handle kernel paging request at virtual address 80008024
> > printing eip:
> > c0131dd9
> [snip]
>
> Would it be possible to run that through ksymoops to give actual names to
> those addresses. That segfault as given has no useful information.

Well it does tell us the last thing printed was orinoco_reset().

> Is it the kernel spitting that out or klogd?

The ooops was transcribed by hand off the console after lockup.

> Recent klogds (iirc) store useful debugging information in
> /var/log/ksymoops which may be useful for decyphering the oops.

I don't think we did a good job of running it through ksymoops but it will
have to do for now. Of the last 10 lockups, 2-3 have generated oops and the
other 7 have provided no debugging information at all.

I'll try compiling up a uni-processor kernel in a few days and see if the
problems persist. I'm running a heavily updated RH6.2. My klogd doesn't seem
to do any logging in /var/log/ksymoops.

ksymoops 2.3.5 on i686 2.4.15-pre5. Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.15-pre5/ (default)
     -m /boot/System.map (specified)

Warning (compare_maps): mismatch on symbol nlmsvc_ops , lockd says e0cf72d0, /lib/modules/2.4.15-pre5/kernel/fs/lockd/lockd.o says e0cf673c. Ignoring /lib/modules/2.4.15-pre5/kernel/fs/lockd/lockd.o entry
Warning (compare_maps): mismatch on symbol nfs_debug , sunrpc says e0cea30c, /lib/modules/2.4.15-pre5/kernel/net/sunrpc/sunrpc.o says e0cea00c. Ignoring /lib/modules/2.4.15-pre5/kernel/net/sunrpc/sunrpc.o entry
Warning (compare_maps): mismatch on symbol nfsd_debug , sunrpc says e0cea310, /lib/modules/2.4.15-pre5/kernel/net/sunrpc/sunrpc.o says e0cea010. Ignoring /lib/modules/2.4.15-pre5/kernel/net/sunrpc/sunrpc.o entry
Warning (compare_maps): mismatch on symbol nlm_debug , sunrpc says e0cea314, /lib/modules/2.4.15-pre5/kernel/net/sunrpc/sunrpc.o says e0cea014. Ignoring /lib/modules/2.4.15-pre5/kernel/net/sunrpc/sunrpc.o entry
Warning (compare_maps): mismatch on symbol rpc_debug , sunrpc says e0cea308, /lib/modules/2.4.15-pre5/kernel/net/sunrpc/sunrpc.o says e0cea008. Ignoring /lib/modules/2.4.15-pre5/kernel/net/sunrpc/sunrpc.o entry
Code: 8b 43 08 8b 80 90 00 00 00 85 c0 74 11 8b 40 34 85 c0 74 0a
Using defaults from ksymoops -t elf32-i386 -a i386

Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
   0: 8b 43 08 mov 0x8(%ebx),%eax
Code; 00000003 Before first symbol
   3: 8b 80 90 00 00 00 mov 0x90(%eax),%eax
Code; 00000009 Before first symbol
   9: 85 c0 test %eax,%eax
Code; 0000000b Before first symbol
   b: 74 11 je 1e <_EIP+0x1e> 0000001e Before first symbol
Code; 0000000d Before first symbol
   d: 8b 40 34 mov 0x34(%eax),%eax
Code; 00000010 Before first symbol
  10: 85 c0 test %eax,%eax
Code; 00000012 Before first symbol
  12: 74 0a je 1e <_EIP+0x1e> 0000001e Before first symbol

 <1>Unable to handle kernel paging request at virtual address 80008024
        c0131dd9
*pde = 00000000
Oops: 0000
CPU: 1
EIP: 0010:[<c0131dd9>] Not tainted
EFLAGS: 00010286
eax: 80008000 ebx: cd5add60 ecx: dfbde640 edx: cd5add60
esi: 00000003 edi: 00000000 ebp: 00000001 esp: cfefde7c
ds: 0018 es: 0018 ss: 0018
Process tail (pid: 2420, stackpage=cfefd000)
Stack: 00000003 00000003 cc7428c0 c0119028 cd5add60 cc7428c0 ccdffaa0 cfefc000
       0000000b 80008008 cc7429e0 c01197b5 cc7428c0 00000000 ccdffaa0 00000000
                      c01072cf 0000000b 00000000 c0113298 c02199be cfefdf80 00000000 cfefc000
Call Trace: [<c0119028>] [<c01197b5>] [<c01072cf>][<c0113298>][<c0112f2c>]
   [<c0113e83>] [<c0106e64>] [<c0110018>] [<c0138a8a>] [<c0106d73>]
Code: 83 78 24 00 74 4c be 00 e0 ff ff 21 e6 8b 46 1c 8d 50 01 89

>>EIP; c0131dd9 <filp_close+2d/a4> <=====
Trace; c0119028 <put_files_struct+58/c0>
Trace; c01197b5 <do_exit+111/24c>
Trace; c01072cf <die+63/64>
Trace; c0113298 <do_page_fault+36c/4b4>
Trace; c0112f2c <do_page_fault+0/4b4>
Trace; c0113e83 <schedule+3ab/5a0>
Trace; c0106e64 <error_code+34/3c>
Trace; c0110018 <mtrr_add_page+264/3c8>
Trace; c0138a8a <sys_fstat64+1a/60>
Trace; c0106d73 <system_call+33/38>
Code; c0131dd9 <filp_close+2d/a4>
00000000 <_EIP>:
Code; c0131dd9 <filp_close+2d/a4> <=====
   0: 83 78 24 00 cmpl $0x0,0x24(%eax) <=====
Code; c0131ddd <filp_close+31/a4>
   4: 74 4c je 52 <_EIP+0x52> c0131e2b <filp_close+7f/a4>
Code; c0131ddf <filp_close+33/a4>
   6: be 00 e0 ff ff mov $0xffffe000,%esi
Code; c0131de4 <filp_close+38/a4>
   b: 21 e6 and %esp,%esi
Code; c0131de6 <filp_close+3a/a4>
   d: 8b 46 1c mov 0x1c(%esi),%eax
Code; c0131de9 <filp_close+3d/a4>
  10: 8d 50 01 lea 0x1(%eax),%edx
Code; c0131dec <filp_close+40/a4>
  13: 89 00 mov %eax,(%eax)

5 warnings issued. Results may not be reliable.

Regards,
Rob

-- 
---------------------"Happiness is understanding."----------------------
Robert Hardy                                          C.E.O. Webcon Inc.
rhardywebcon.net      GPG Key available by request       (613) 276-6206

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